I have an MBP and an iMac and my habit is to sync between them using my iPhone (make MobileMe free and maybe I will consider it). Everything was fine until last week when I bought an iPhone 4/iOS4.
I am doing the same thing that I have always done - asking iTunes on the two computers to merge the data. But now one set of Calendar/Address Book entries seems to be replacing the other each time I sync. So my MBP entries will transfer onto the iPhone when I sync with that, but then when I plug into the iMac and Sync, the entries on the iMac replace those synced to the iPhone via the MBP. The same happens when I do it the other way.
Has anyone else experienced this and maybe have a fix?
Both machines are 10.6.4 running iTunes 9.2
Should I restore the iPhone and resync?
2006 intel iMac 17"/2006 MBP/iPhone4, Mac OS X (10.6.4)
I too am having this problem on 3GS / iTunes 9.2 / 10.6.4 and all I can say is it is HORRIBLE. Calendar's are not accurate now. I've wasted half my day trying to figure out what this problem is and now realize it's a major bug on Apple's end.